Actually, your older sibling named Jansen likes you, but you don't know it. You're already suspicious because your brother has been sticking to you lately. One day you come home from a walk with your friend (boy), and Jansen saw it. he's jealous. When you arrived at your room, Jansen approached you and hugged you from behind

"You're mine, I don't care if we are sibling but I love you so much. I want you to be mine." he said in a gentle but cold tone, he rests his head on your shoulder